Process for the suppression of dust during the working up of panama bark.



TTE il STATES A NT Q FFTQE.

ROBERT MANDELBAUM, OF ASPERG, GERMANY.

PROCESS FOR THE SUPPRESSION OF DUST DURING THE WORKING UP OF PANAMABARK.

No Drawing.

To all whom it may concern Be it known that I, Dr. Ing. ROBERTMAnnELBAUM, residing at Asperg, in the Kingdom of lVurttemberg, Empireof Germany, have invented certain new and useful Improvements inProcesses for the Suppression of Dust During the Working Up of PanamaBark, of which the following is a specification.

In technical establishments of the most varied kind, as well as inpublic life generally the formation of dust is always felt as a mostirksome evil. Suggestions have been advanced and experiments made inevery possible direction, aiming at the elimination of dust, but all themeasures for keeping dust down, so far as they have been made known,represented merely periodical attempts without lasting effect,immaterial, whether it was by mechanical action or by damping materials,to which disinfecting substances might be added, if need be, with dueobservance of hygienic principles.

During the preparation of Panama bark the great development of dust ismost sensibly felt, owing to its poisonous hemolytical nature andirritating effects on the human organism, especially on the mucousmembranes in the nose, eyes and throat, with cough to begin with. Thedevices against all this, resorted to up to the present, such asrespirators, etc., are insufiicient, because they are unable permanentlyto attach to the bark those infinitesimal particles, inherent to Panamabark, from which they detach themselves during the process ofpreparation. Owing to this fact the use of Panama bark for domesticpurposes is a comparatively small one, in spite of the other wellknownexcellent properties of this drug, since the consumers have up to thispresent time not been protected sufficiently against its noxioussecondary eflects. The present invention accomplishes the permanentattachment of these infinitesimal particles, sometimes equal to 10% ofthe weight of the bark-or in other words, the loading of them to such adegree as to deprive them thoroughly of their capacity to turn intodust, with the result that even during the working up of the bark nodust is formed. This is attained in the following way: Let the bark forinstance be treated with a solu- Specification of Letters Patent.

Patented Feb. 16, 1915.

Application filed August 19, 1913. Serial No. 785,515.

tion of hygroscopic bodies, such as chlorid of calcium (CaCl or of zinc(ZnCl or mixtures of such bodies, when the hygroscopic properties ofthese bodies will effect a permanent attachment of all the powderyparticles to the bark; moreover may the Panama bark be impregnated witha concentrated solution of boraX, which possesses the capacity ofcovering the bark after evaporation completely with a layer impenetrableto dust; finally the Panama bark may be damped with a solution of suchbodies as will stick, in the full sense of the word, the looselyattached particles permanently to the bark, such bodies being forinstance all solutions of glue, dextrin, sugar, etc., to which may withadvantage be added the hygroscopic bodies aforementioned, the purposebeing the prevention of mold on the Panama bark through theirantibacterian action. This latter effect may, however, be attained alsoby the addition of salicylic acid or other similar substances. Theoperation with hygroscopic bodies may also be carried out by mixing thepowdered Panama bark with'the dry bodies when the intended effect willbe arrived at either by the influence of the damp air or by the addition of water. The Panama bark treated in this way has completely lostthose irritating properties which induce coughing. The said proceedingin addition allows of a more economical utilization of the Panama bark,because the dust, which formerly resulted from the operation,had aconsiderably lower market value than the cut Panama bark, in consequenceof its irksome effects.

What I claim and desire to secure by Letters'Patent is:

1. The herein described process for preventing the formation of dustlike particles during the preparation of Panama bark which consists inimpregnating the bark with a substance which will permanently attach tothe bark the dust like particles ordinarily formed during the mechanicalpreparation of the bark.

2. The herein described process for preventing the formation of dustlike particles during the preparation of Panama bark which consists inimpregnating the bark with a substance having hygroscopic properties. Q

8. The hereinv described process for pre- In testimony whereof I afiixmy signature venting the formation of dust like particles in presence oftwo Witnesses. during the preparation of Panama bark DR- ING. ROBERTMANDELBAUM. which consists in impregnating the bark Witnesesp 5 With asolution of a hygroscopic substance JEAN GULDEN,

and an adhesive substance. RUDOLF WALTERS.

Copies 0! this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington; D. G. 5 p

